VBS_KALAMAR.A

February 12, 2016
 Analysis by: Jeanne Jocson
 ALIASES:

Virus:VBS/SST.A@mm(Microsoft),VBS/SST(NOD32),VBS.SST@mm(Norton)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

2,857 bytes

File Type:

VBS

Memory Resident:

Yes

Initial Samples Received Date:

11 Feb 2016

Arrival Details

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This worm drops a copy of itself in the following folders using different file names:

  • %Windows%\AnnaKournikova.jpg.vbs

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

Other System Modifications

This worm adds the following registry entries:

HKEY_CURRENT_USER\Software\OnTheFly
Worm made with Vbswg 1.50 = ""

HKEY_CURRENT_USER\software\OnTheFly\
mailed
1 = ""

Other Details

This worm connects to the following possibly malicious URL:

  • http://www.{BLOCKED}te.nl

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

5.883.00

FIRST VSAPI PATTERN DATE:

08 Apr 2009

VSAPI OPR PATTERN File:

5.883.00

VSAPI OPR PATTERN Date:

08 Apr 2009

Step 1

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 2

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 3

Terminate a process file/s detected as VBS_KALAMAR.A

[ Learn More ]

*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.

Step 4

Delete these registry values

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator’s help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\OnTheFly
    • Worm made with Vbswg 1.50 = ""
  • In HKEY_CURRENT_USER\software\OnTheFly\mailed
    • 1 = ""

Step 5

Scan your computer with your Trend Micro product to delete files detected as VBS_KALAMAR.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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